scholarly journals Gold determination in soil by ICP-MS: comparison of sample pretreatment methods

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiaodan Tang ◽  
Bing Li ◽  
Jilong Lu ◽  
Hongyan Liu ◽  
Yuyan Zhao
Keyword(s):  
Inductively Coupled Plasma ◽  
Selective Adsorption ◽  
Microwave Digestion ◽  
Sample Pretreatment ◽  
Electric Heating ◽  
Mining Area ◽  
Digestion Method ◽  
Laboratory Procedure ◽  
Gold Determination ◽  
Icp Ms

Abstract At present, the direct gold determination in geological samples by inductively coupled plasma mass spectrometry (ICP-MS) is still an arduous challenge due to both spectral and background interferences. It is very important and necessary to study the pretreatment processes; therefore, the polyurethane foam treatment and sample digestion methods are explored and compared here. The experimental results showed that the gold adsorption rate of treated foam was significantly improved as the impurities in the foam were cleaned up, and the potential difference of the liquid membrane was increased. Meanwhile, the combination of the foam enrichment and thiourea desorption achieved the selective adsorption and desorption of gold ions, eliminated the interference of coexisting ions, and perfected the detection limits. Compared with the traditional electric heating plate digestion method, microwave digestion, a closed digestion method, had the advantages of less sample and reagent dosage, short time consumption, high degree of automation, thorough digestion, good security, and environmental friendliness and met the requirements of green chemistry development. The proposed microwave digestion-foam enrichment-thiourea desorption-ICP-MS determination method was applied to the gold test in soil samples of the actual gold mining area. It has the great potential as a routine laboratory procedure.

scholarly journals Influence of Sample Pretreatment on the Analysis of High Contents of Rare-Earth and High Field Strength Elements in Geological Samples by ICP-AES and ICP-MS (Case Study of the Tomtor Deposit)

2020 ◽  
pp. 593-605
Author(s):  
Bagai-ool Yu. Saryg-ool ◽  
Lidiya N. Bukreeva ◽  
Irina N. Myagkaya ◽  
Aleksandr V. Tolstov ◽  
Elena V. Lazareva ◽  
...  
Keyword(s):  
Rare Earth ◽  
Field Strength ◽  
Inductively Coupled Plasma ◽  
High Field ◽  
Sample Pretreatment ◽  
Emission Spectrometry ◽  
Geological Samples ◽  
High Field Strength ◽  
Inductively Coupled ◽  
Icp Ms

Influence of sample pretreatment on the analysis of the high contents of rare earth (REE) and high field strength (HFSE) elements in geological samples by inductively coupled plasma atomic emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS) was studied. The rocks and rich ores of the Tomtor Nb-REE deposit were explored. Complete dissolution of the geological samples with a high content of “refractory” minerals has been achieved using fusion with a sodium peroxide. The results obtained by ICP-AES and ICP-MS after chemical dissolution are comparable with the results obtained by the XRF-SR without chemical pretreatment

scholarly journals Elemental analysis of coffee: a comparison of ICP-MS and AAS methods 

2014 ◽  
Vol 32 (No. 4) ◽  
pp. 354-359 ◽  
Author(s):  
M. Jarošová ◽  
D. Milde ◽  
M. Kuba
Keyword(s):  
Inductively Coupled Plasma ◽  
Microwave Digestion ◽  
Absorption Spectrometry ◽  
Mineral Nutrients ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Microwave Digestion System

We determined the mineral nutrients and toxic elements (Ca, Cu, Fe, Mg, Zn, Cd, Cr, Mn, Ni, and Pb) in five types of coffee by atomic absorption spectrometry and inductively coupled plasma mass spectrometry. The decomposition of the samples took place in a microwave digestion system with HNO<sub>3</sub> and H<sub>2</sub>O<sub>2</sub> reagents. Partial validation of the method was performed by using the certified reference material (NCS ZC 73014). Univariate and multivariate statistical methods were used to compare both the coffee samples and the techniques used. No significant differences were found between two used methods. Significant differences occurred between the coffee samples but only the application of multivariate statistics helps to distinguish among samples from different locations.

scholarly journals New Possibility for REE Determination in Oil

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Alexander Soin ◽  
Tatiana Maryutina ◽  
Natalya Musina ◽  
Andrey Soin
Keyword(s):  
Rare Earth ◽  
Nitric Acid ◽  
Rare Earth Elements ◽  
Stationary Phase ◽  
Inductively Coupled Plasma ◽  
Sample Pretreatment ◽  
Accurate Method ◽  
Inductively Coupled ◽  
Novel Approach ◽  
Icp Ms

A novel approach of rare earth elements (REE) determination in crude oil is suggested. Special application of countercurrent chromatography (CCC) is used as a sample pretreatment tool. An oil sample is continuously pumped through the rotating coil column (RCC) as a mobile phase, while an aqueous phase (nitric acid solution) is retained as a stationary phase. Two phases are kept well mixed and agitated, but there is no emulsion at the interface under the chosen conditions. Special features of CCC give an opportunity to vary the volume of oil samples to be analyzed from 10 mL to 1 L or more. Trace metals are preconcentrated into 10 mL of stationary phase (acidic solutions) pumped out of the column so that analysis can be easily determined with inductively coupled plasma mass spectrometry (ICP-MS) without additional sample preparation procedures. Optimal concentration of nitric acid in the stationary phase for preconcentration of REE from oil by CCC has been investigated. The combination of CCC with ICP-MS gives the possibility to develop a rapid, reliable, and accurate method of trace metal including rare earth elements (REE) determination in crude oils and oil products. Such method could be an alternative for unexpanded and expensive neutron-activation analysis (NAA).

scholarly journals The Absorption, Distribution, and Excretion of 18 Elements of Tibetan Medicine Qishiwei Zhenzhu Pills in Rats with Cerebral Ischemia

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yinglian Song ◽  
Ke Fu ◽  
Dewei Zhang ◽  
Min Xu ◽  
Ruixia Wu ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Inductively Coupled Plasma ◽  
Microwave Digestion ◽  
Venous Blood ◽  
Artery Occlusion ◽  
Tibetan Medicine ◽  
Inductively Coupled ◽  
Icp Ms

The aim of this study is to determine 18 elements in Tibetan medicine Qishiwei Zhenzhu pills (QSW) and their absorption, distribution, and excretion in rats with cerebral ischemia. Microwave digestion and inductively coupled plasma mass spectrometry (ICP-MS) were used to determine 18 elements of QSW in simulated gastrointestinal (GI) juice. Rats were given QSW (66.68 mg/kg) followed by middle cerebral artery occlusion (MCAO). Sham rats received saline and were not subjected to MCAO. ICP-MS was applied to determine the content of 18 elements in hepatic venous blood, abdominal aortic blood, brain, liver, kidney, hair, urine, and feces 24 h after MCAO. In vitro results showed that the extraction rate of Mn, Cu, Sr, Pb, Au, and Hg of QSW in gastric juice (1 h) was higher than that in water, and the contents of Cu, Au, Sr, and As were higher in intestinal juice (4 h) than in water. In vivo results showed that the contents of elements in the blood were quite low, and QSW increased Ni, Cr, Sr, Co, and V in artery blood and decreased V in venous blood. Elements in the tissues were also low, and QSW increased brain Li but decreased Cr and Cd; QSW increased kidney Ag and Cs and liver Mn but decreased liver Ni. QSW increased urinary excretion of Li, Sr, Hg, Cs, and V; QSW increased Hg content in hair but decreased Ni. Stool is the main excretion pathway of the elements in QSW, with Ba, Mn, Sr, Cd, V, Cu, Cs, Li, Pb, Ag, Hg, Cr, As, and Co the highest. In summary, this study examined the distribution of 18 elements in QSW-treated MCAO rats. The accumulation of these elements in blood and tissues was extremely low, and the majority was excreted in feces within 24 h, highlighting the importance of the gut-microbiota-brain axis in QSW-mediated brain protection.

scholarly journals Aquamarine from Thach Khoan Mining Area in Phu Tho Province, Vietnam

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Dương Lý Thùy
Keyword(s):  
Inductively Coupled Plasma ◽  
Mining Area ◽  
Global Market ◽  
Type I ◽  
Electron Probe Micro Analysis ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Micro Analysis ◽  
Raman And Ir Spectroscopy

Abstract: Aquamarine is a kind of gemstone having attractive color, valuable and being a potential material in gemological industry. In Vietnam, Thach Khoan area has become a noticeable location to explore aquamarine. However, the researches of aquamarine are still limited. Therefore, this study was conducted to determine the characteristics of aquamarine. Eight aquamarine samples from granitic pegmatites in Thach Khoan commune, Thanh Son District, Phu Tho Province were investigated by classical gemological methods, Electron Probe Micro-analysis (EMPA) and Laser Ablation – Inductively Coupled Plasma – Mass Spectrometry (LA-ICP-MS) methods, Raman and Fourier transform infrared (FTIR) spectroscopy. Results showed that aquamarine presents a low concentration of alkali and high amount of iron. Raman and IR spectroscopy indicate the vibrations of specific bonds including Si-O, Al-O, Be-O, the presence of CO2 and type I H2O in structural channels. By dint of that, we are going to study the potential treatment methods of aquamarine in Vietnam in the following study to enhance its quality as well as value in the global market.

scholarly journals One-factor-at-a-time method combined with ICP-MS for determining 11 elements in soy sauce and their migration from the containing glass bottles

2021 ◽  
Vol 41 (1) ◽  
pp. 10-20
Author(s):  
Xun Gao ◽  
Kexin Chen ◽  
Yue Zhang ◽  
Miaomiao Chi
Keyword(s):  
Risk Assessment ◽  
Inductively Coupled Plasma ◽  
Microwave Digestion ◽  
Soy Sauce ◽  
Metal Elements ◽  
Inductively Coupled ◽  
Migration Study ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Glass Bottles

Abstract This study was designed to determine the 11 metal elements (Al, Cr, Mn, Fe, As, Ni, Cu, Zn, Cd, Sb, and Pb) in soy sauce and their migration from the containing glass bottles. Inductively coupled plasma mass spectrometry (ICP-MS) was applied for the determination of the elements and one-factor-at-a-time method was employed for optimizing the ICP-MS parameters in migration experiment and microwave digestion experiment. The developed method was successfully applied to determine the content of 11 elements. The results showed that the experiment had excellent correlation and sensitivity. The accuracy of the elements in the migration study and test of soy sauce itself ranging from 84.25% to 118.75% was satisfied, and the precision of the method was validated and the RSD was no more than 15.5%. The concentration of all the detected metal elements migrated from the glass bottles were between 0.3450 and 2.398 ng·mL−1, and the risk assessment indicated that the metal elements in soy sauce had no risk to the public health. The proposed methodology in this study was successfully applied for the quality control for metal elements in soy sauce and the containing glass bottles for the first time, and a research method suitable for soy sauce consumption process control and risk assessment has been established.

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